JP2009061386A - Dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collector capable of improving a dust knocking-off effect by means of a dust knocking-off device. <P>SOLUTION: In the dust collector wherein the inside of a casing 2 is vertically demarcated with a partition wall 3, one portion serves as a dust-containing air introducing chamber 4 and the other as a cleaned air chamber 5, an opening end of cylindrical filter cloth F is mounted in a mounting hole 3a of the partition wall 3, dust-containing air is introduced from the opening end of the filter cloth F, and dust attached to the inner periphery of the filter cloth F is knocked off by vibration of a vibration frame 11 of the dust knocking-off device 10, the vibration frame 11 of the dust knocking-off device 10 is allowed to abut on rods 8 disposed along the length direction of the filter cloth F. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dust collector, and more particularly, to an improvement in the removal of dust attached to the inner peripheral surface of a filter cloth of a dust collector that filters exhaust gas by an internal filtration method using a suspended tubular filter cloth.

In general, various dust collectors are used to collect dust in exhaust gas discharged from a waste incinerator or an electric furnace for incinerating household waste and the like.
Among these, in the backwash-type dust collector that performs internal filtration, when a large amount of dust adheres to the inner peripheral surface of the filter cloth and the ventilation resistance (pressure loss) exceeds a predetermined value, or after a certain period of time, The suction from the suction device is stopped, a reverse airflow is generated, and dust adhering to the inner peripheral surface of the filter cloth is removed.
In addition, when the suction device is stopped, or at the same time as the removal due to the generation of the reverse airflow, a means for operating the dusting device for dusting off to remove dust adhering to the inner peripheral surface of the filter cloth Has also been adopted.

As shown in FIG. 5, the backwash type dust collector 30 divides the inside of the housing 2 into upper and lower parts by a partition wall 3, a lower part is a dust-containing air introduction chamber 4, and an upper part is a purified air chamber 5. The air introduction chamber 4 is connected to a dust generation source (not shown), and the purified air chamber 5 is connected to a suction device 6.
Generally, the housing 2 is arranged so as to be connected in a plurality of two rows and four rows in a row, and sucks the exhaust gas by one suction device 6, although it varies depending on the capacity of the exhaust gas filtered by the dust collector 30. I am doing so.
The partition wall 3 has a plurality of bottomed tubular filter cloths F ′ with open ends attached to the filter cloth mounting holes 3a of the partition wall 3 and closed ends disposed above the purified air chamber 5. 7 is attached.
In addition, an expansion suppression ring R for suppressing expansion of the filter cloth F ′ that is in a filtered state by operating the suction device 6 is sewn to the outer peripheral surface of the filter cloth F ′ at a predetermined interval.

As a result, during operation of the dust collector 30, the exhaust gas containing dust from the dust generation source is guided to the dust-containing air introduction chamber 4 through the inlet 4 a by the suction force of the suction device 6, and the dust is filtered by the filter cloth F. The purified air is discharged through the purified air chamber 5.
Next, when dust accumulates on the inner peripheral surface of the filter cloth F ′ and the ventilation resistance (pressure loss) exceeds a predetermined value or after a predetermined time has elapsed, the suction from the suction device 6 is stopped, and the suction device 6 A fan for reverse or backwashing (not shown) is activated to generate a backflow for backwashing the filter cloth F ′ in the purified air chamber 5, or to operate the wiping device simultaneously with the backflow. Thus, the dust adhering to the inner peripheral surface of the filter cloth F ′ is removed.

  Various methods have been proposed for the wiping-off device 40 used in the backwash type dust collector 30. For example, the attachment member 7 for attaching the closed end of the filter cloth F ′ is attached to the housing 2 with the buffer mechanism 41. And the mounting member 7 is shaken back and forth by the vibration mechanism 42 to remove dust on the inner peripheral surface of the filter cloth F ′ (see, for example, Patent Document 1), as shown in FIG. The filter cloth F is inserted into the lattice-shaped vibration frame 43, and for example, the rotation of the electric motor 44 is converted into a reciprocating motion by the link mechanism 45, the vibration frame 43 is vibrated, and the inner surface of the lattice-shaped vibration frame 43 is filtered. There has been proposed a method in which the filter cloth F ′ is shaken back and forth by being applied to the cloth F ′, and dust adhered to the inner peripheral surface of the filter cloth F ′ is removed.

Japanese Utility Model Publication No. 57-119722

  By the way, the method of shaking the mounting member 7 in the conventional dust collector by the vibration mechanism 42 causes the vibration at the lower end portion of the filter cloth F ′ to be small, and the efficiency of the removal at the lower end portion is poor. The method of applying the inner surface of the lattice-shaped vibrating frame 43 to the filter cloth F ′ also has a problem that the vibration at a location away from the location where the vibrating frame 43 hits is small and a sufficient removal effect cannot be obtained.

  An object of the present invention is to provide a dust collector capable of improving the dust removal efficiency of the dust removal device in view of the problems of the conventional dust collector.

  In order to achieve the above object, the dust collector of the present invention divides the inside of the housing vertically by a partition wall, one is a dust-containing air introduction chamber, the other is a purified air chamber, and the mounting hole of the partition wall has a cylinder Attach the opening end of the filter cloth, introduce dust-containing air from the opening end of the filter cloth, and remove dust adhering to the inner peripheral surface of the filter cloth by the vibration to the filter cloth by the vibration frame of the device In the dust collector, the vibration frame of the wiper is in contact with a rod disposed along the length direction of the filter cloth.

  In this case, the rod can be connected to an expansion suppression ring disposed on the outer periphery of the filter cloth.

  Further, an impact force can be applied to the vibration frame by the impact generating member.

  Furthermore, a plurality of filter cloths can be placed in a lattice-like vibration frame.

  According to the dust collector of the present invention, since the vibration frame of the wiper device is in contact with the rod disposed along the length direction of the filter cloth, the upper and lower sides of the filter cloth that the vibration frame does not directly contact are surely secured. The dust attached to the inner peripheral surface can be effectively wiped off along the length direction of the filter cloth by vibrating.

  Also, when the rod is connected to the expansion suppression ring arranged on the outer peripheral surface of the filter cloth, the vibration is surely transmitted to the entire filter cloth through the ring, and the dust adhering to the inner peripheral surface is surely wiped off. Can do.

In addition, when an impact force is applied to the vibration frame by the impact generating member, dust can be more effectively removed than when the filter cloth is vibrated through the vibration frame.
Also in this case, the filter cloth can be effectively prevented from being damaged by an impact force by setting the filter cloth contact position of the vibration frame to a place where the metal expansion suppression ring is sewn.

  Further, when a plurality of filter cloths are put in the lattice-shaped vibration frame, the plurality of filter cloths can be wiped off by only vibration of one vibration frame.

Hereinafter, embodiments of the dust collector of the present invention will be described with reference to the drawings. In addition, about the structure similar to a conventional apparatus, the same code | symbol and a series of code | symbol are attached | subjected, and description is abbreviate | omitted.
1 to 4 show an embodiment of the dust collector of the present invention.

In the dust collector 1, as in the conventional apparatus, the interior of the housing 2 is vertically divided by a partition wall 3, the lower part is a dust-containing air introduction chamber 4, and the upper part is a purified air chamber 5. A purified air chamber 5 is connected to a generation device (not shown) via an inlet 4a (see FIG. 5), and the purified air chamber 5 is connected to a suction device 6.
In the filter cloth attachment hole 3 a (see FIG. 5) of the partition wall 3, open ends of a number of cylindrical filter cloths F are attached, and closed ends are attached to attachment members 7 disposed in the upper part of the purified air chamber 5. Like that.

The filter cloth F is sewn with an expansion suppression ring R for suppressing the expansion of the filter cloth F at predetermined intervals when the suction device 6 is operated (filtered state), thereby suppressing the expansion of the filter cloth F in the filtered state. In addition, the distance at which the filter cloth F shrinks inward during backwashing is also suppressed.
And the inner surface 11a of the vibration frame 11 is arrange | positioned so that it may contact | abut to the rod 8 attached over the full length of the filter cloth F. FIG.
In this case, as shown in FIG. 2B, the rod 8 may be firmly connected and attached using fastening means such as the expansion suppression ring R and the wire W arranged on the filter cloth F. Preferably, by connecting the rod 8 and the expansion suppression ring R, the vibration of the rod 8 is transmitted to the entire expansion suppression ring R and can be effectively removed.

  The drop-off device 10 can be configured to convert the rotational motion of the motor into a linear motion by a link mechanism and vibrate the vibrating frame 11 by the linear motion, as in the conventional example. By applying the impact force by the impact generating member 12 made of a hammering device or the like, the dust attached to the inner peripheral surface of the filter cloth F can be more effectively removed as compared with the case where the impact force is applied. Can do.

The arrangement position of the vibration frame 11 is not particularly limited. By arranging the vibration frame 11 at a position in contact with the expansion suppression ring R in the vicinity of the middle position of the filter cloth F, the vibration frame 11 is evenly vibrated up and down. Alternatively, it is preferable in that an impact force can be transmitted.
In addition, the vibration frame 11 can be arranged in units of filter cloths F or rows of filter cloths F, but a plurality of filter cloths F can be wiped off only by vibration of one vibration frame 11. It is preferable to have a lattice shape so that it can be made, and as shown in FIG. 3A, in addition to a lattice shape in plan view, ring-shaped members can also be connected as shown in FIG. .

As shown in FIG. 3, the rods 8 are arranged at two locations (180 ° intervals) in positions aligned with the direction in which the vibration frame 11 vibrates (see arrows) by the vibration generating member or the impact generating member 12. ing.
When the vibration generating member or the impact generating member 12 is disposed at two locations so that the vibration generating member or the impact generating member 12 applies the vibration or the impact in the horizontal direction in addition to the vertical direction in the illustrated example. The four rods 8 are arranged at intervals of 90 °.
In this case, it is possible to perform more effective removal by alternately operating the vibration generating member or the impact generating member 12 at two locations.

The attachment work of the rod 8 is carried out in the field work in the purified air chamber 5 of the dust collector 1, and the length of the filter cloth F varies depending on the size of the dust collector 1, but exceeds 10 m for a long one. As shown in FIG. 4, by dividing the unit rods 8a, 8b, 8c, 8d... Having a length L (for example, 2 m) that can be carried, and connecting the ends thereof in a rotatable manner, It can be carried into the purified air chamber 5 in a folded state, straightened inside the purified air chamber 5 and sewn to the filter cloth F.
The rod 8 is preferably attached over the entire length of the filter cloth F. However, the rod 8 may be attached over a part of the filter cloth F within a range in which the effect of scraping can be exhibited.

In the above configuration, when a large amount of dust adheres to the filter cloth F of the dust collector 1 and the ventilation resistance (pressure loss) exceeds a predetermined value, or when suction from the suction device 6 is stopped after a predetermined time, or When the reverse airflow is generated in the purified air chamber 5, the vibration generating member or the shock generating member 12 of the wiping device 10 for wiping off dust is operated.
By applying the vibration or impact force from the vibration generating member or the shock generating member 12 to the vibration frame 11, the rod 8 disposed over the entire length of the filter cloth F from the vibration frame 11, and the filter cloth F from the rod 8. Vibration force or impact force is transmitted to the whole, and the dust adhering to the inner peripheral surface of the filter cloth F can be effectively removed.
In this case, when the rod 8 is connected to the expansion suppression ring R sewn on the filter cloth F, the impact force transmitted to the rod 8 is more reliably applied to the entire filter cloth F via the expansion suppression ring R. It is possible to transfer dust effectively.

In addition, the timing of the operation of the vibration generating member or the impact generating member 12 is the time immediately before the backwash air flow is generated while the suction device 6 is stopped, that is, when the operation of the wiper device 10 is performed together with the backwash by the backwash airflow It is preferable to operate in a neutral state where the pressure in the filter cloth F is approximately 0 Pa.
The backwash airflow is generated by reversing the suction device 6 or by starting a backwash fan (not shown) as in the conventional example, as well as the housing 2 and the suction device to be backwashed. 6 can be closed by a damper or the like, and the exhaust of the suction device 6 can be sent to the purified air chamber 5 of the casing 2 to be backwashed via the damper.

  The dust collector of the present invention has been described based on the embodiments thereof. However, the present invention is not limited to the configurations described in the above embodiments, and is not a suction device, for example, without departing from the spirit thereof. The configuration can be changed as appropriate, for example, by applying exhaust gas from a dust generation source to a dust-containing air introduction chamber, which can be applied to a so-called exhaust gas pushing method.

  The dust collector of the present invention has a characteristic that when dust is wiped off by directly applying vibration or impact to the filter cloth, dust at a location away from the location where the vibration or impact is applied can be effectively removed. Therefore, it can be suitably used for a dust collector having a long overall length of the filter cloth, and can also be widely used for general dust collectors.

It is a front view of the partial cross section of the wiping-off apparatus used for the dust collector of this invention. It is an enlarged front view of the partial cross section which shows attachment of a rod, (a) is a general view, (b) is a perspective view which shows an example of a connection of a rod and an expansion suppression ring. The top view of the partial cross section which shows the positional relationship of a vibration frame and a filter cloth is shown, (a) is the example which employ | adopted the grid | lattice-like frame as a vibration frame, (b) is the example comprised by connecting a ring-shaped member. Show. It is a front view of the partial cross section which shows another Example of a rod. It is a front view of a partial cross section of a general internal filtration backwashing type dust collector. It is a partial sectional front view which shows an example of the dropping-off apparatus used for the conventional dust collector. It is a front view of the partial cross section which shows another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust collector 2 Housing | casing 3 Compartment wall 3a Filter cloth attachment hole 4 Dust-containing air introduction chamber 5 Purified air chamber 8 Rod 10 Doffing device 11 Vibration frame 12 Impact generating member F Filter cloth R Expansion suppression ring

Claims (4)

  The inside of the housing is partitioned vertically by a partition wall, one is a dust-containing air introduction chamber, the other is a purified air chamber, and an opening end of a cylindrical filter cloth is attached to the mounting hole of the partition wall, and the dust-containing air In the dust collector in which the dust attached to the inner peripheral surface of the filter cloth is removed by the vibration to the filter cloth by the vibration frame of the dust removal device, the vibration frame of the dust removal device is A dust collector characterized by being in contact with a rod disposed along the length direction of a filter cloth.   The dust collector according to claim 1, wherein the rod is connected to an expansion suppression ring disposed on an outer periphery of the filter cloth.   3. The dust collector according to claim 1, wherein an impact force is applied to the vibration frame by an impact generating member.   4. A dust collector according to claim 1, wherein a plurality of filter cloths are placed in a lattice-like vibration frame.

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